Sash-cord-pulley frame



(No Model.)

0. LAOOURSE.

SASH GORDiPULLEY FRAME No. 348,979. Patented Sept. 14; 1886.

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UNITED} STATES PATENT GFFICE.

OCTAVE LACOURSE, OF PUTNAM, CONNECTICUT.

" SASH-CORD-PULLEY'FRAME.

SEPECIFICATION forming part of Letters Patent No. 348,979, dated September 14; 1886,

Application filed March 2, 1886. Serial No. 193,723.

To all whom it may concern:

Be it known that I, OOTAVE LACOURSE, a citizen of the United States, residing at Putnam, in the county of Windham and State of Connecticut, have invented certain new and useful Improvements in Sash-Cord Pulleys; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to saslrpulleys, better known as saslrcord guides, and has for its object to greatly improve their construction without increasing the cost in the slightest.

\Vith this end in view I have devised the novel construction of which the following description, in connection with the accompanying drawings, is a specification, numbers being used in the drawings to indicate the several parts of the device.

. The casing of my improved sash-cord guide is tubular in form, is cast in a single piece, and is provided with an external screw-thread. Heretofore in this class of sash-cord guides it has been a serious objection that the threaded portion of the casing was made with the same diameter at both ends. It is of course well understood that no matter 110w thoroughly seasoned building-lumber is supposed to be it invariably shrinks and cracks after fires are started in the house, this being particularly true in houses heated by steam or hot-air furnaces. It has been found in practice that the shrinking of the wood is so great as to render this class of sash-cord guides, as heretofore manufactured, of very much less value than they otherwise would be. As a matter of fact, they become so loose as to look quite badly, and unless they are fastened in some manner they workimperfectly, and frequently pull out entirely. The trouble and annoyance arising from this cause have been so great as to practically drive this class of sashcord guides from the market. These objections are wholly overcome by my improved construction.

In the drawings, Figure 1 is a vertical section of the device complete, showing the sashcord guide in elevation; Fig. 2, a front elevation of the device with the sash-cord removed,

(No model.)

and Fig. 3 is an elevation of a key with which the device is turned into place.

1 indicates the casing,which is cast in a single piece; 2, the co1'd;3, pulleys or rollers journaled in a central opening, 4, in the case. Two or any suitable number of these rollers may be used, and they may be located in the casing according to the bestjudgmcnt of the manufacturer. In practice I preferably use two rollers only, placing-them near the oppo-' site ends of the casing, a portion of the rollers. projecting out of the casing at the front and rear, so that in use the cord will just clear the jamb and easing.

I am quite well aware that it is not new to make the cases of sash-cord guides cylindrical in form, and to provide them with an external screw-thread. The essential principle of my invention, however, is, that the screw-thread 5 is made to taper inward slightly from the face to the end of the threaded portion. It will of course be understood that they may be .made of any desired size, and that the proportions may be changed within reasonablelimitswithout departing from the spirit of myinvention.

I n practice I preferably carry out substantially the following proportions: Suppose that it is desired to insert the sash cord guide in an inch hole. Imake the face of the casing an inch and one-eighth in diameter, form the screwthrcad to extend back about an inch and oneeighth from the face, and make the diameter of the thread at the back one inch. It will of course be understood that in using this style of sash-cord guides it is simply necessary to bore a hole in the face of the jamb and to turn the casings in, a key being provided, substantially as shown in Fig. 3, with which to turn them in.

As my improved saslrcord guide is turned into place,it acts to compress the fibers of wood without breaking them, so that although considerable shrinkage of the wood will take place the casing will still be held firmly in its position by the wood itself, thus rendering additional fastenings wholly unnecessary, the great advantage of my improved construction being that the casings may be screwed down firmly in place, flush with the face of the jamb when they are first put in, so that they will work perfectly then, and when shrinking the diameter of said casing being greatest at of the wood takes place they will stillbe held its outer end, and tapering inward evenly as firmly as when they were first screwed in from that point to the innerv end of the screw place. l thread, as and for the purpose set forth. 5 Having thus described my invention, I In testimony whereofI affix my signature in IS elaim presence of two witnesses.

As a new manufacture, a sash-e0rd guide OU'IAVE LMJOURSIQ. consisting of a tubular casing adapted to re- \Vitnesses: ceive a cord in the usual manner, and provid- A. M. \VOOSTIGR, Io ed with an external tapering serewiliread, C. E. ftUmiLEs. 

